Back-water and check valve



Oct. 20, 1931. A v c, RYMAL 1,827,913

BACK WATER AND CHECK VALVE Filed June 28, 1930 I n vex: fir

b f a? JHTEM ey Cecil H, Hymal' endurin Patented Oct. .26, 1931 stares.

' was earners castes CECIL-H. BYMAIqOF CHICAGO, ILLINOIS, ASSIGNED! 0Fown-w GEORGE MILSK. OF

' CHICAGO, ILLWOIS Baez-warns. AND m VALVE I Application ill-ed June 28,1980. Serial No. 484,470.

- t This invention relates to a back-water and check valve. 1

One of the main objects of this invention is to provide an inexpensive,but eflicient and back-water and check valve .which is especiallyadapted foruse in sewer corduits, and the like. Another object is toprovide such a valve construction wherein the larger portion or .casingmay be of an inexpensive material, as for instance cast iron, and thevalve seat. and valve element proper may be set or mounted in the casingand may be,of a nonrus'table material, such as brass or rust-resistingsteel.

These and other objects are attained with this invention, asdisclosed-in the description and in the accompanyin .drawin s wherein:

Fig. 1 is a plan viewo the pre erred form of construction, parts, beingbroken away.

Fig. 2 is a vertical longitudinal sectional view, taken on ,line 22 0Fig. 1.

Fig. 3 is a vertical cross-sectional view, taken on line 33 of Fig. 2.

This valve invention is es ecially suitable for use in .sewer conduits,gut is also well adapted for use in other conduits and pipes, such aswater pipes and the like.

In the drawings my invention is illustrated in its preferred form ofconstruction comprising a valve casing 6 including a tubular body 'orconduit portlonwhich may be cylindrical or of any suitable shape incross-sew tion, and which preferably,is provided with bell means 7 atits inlet end and with nipple means 8 at its outlet end, to facilitatemounting orinterposing it in conduitsof the usual shape. v

..A"tubular branch or neck 9 is provided on v thetubular conduitportion, to extend from he cylindrical part thereof and substantially tright angles thereto, and is preferably formed integral therewith. Acover or closure 'lO is-iemovably mounted on said neck, as "with bolts11, thus providing an inspection port and access to the essential valveelements. Whenever the conduit is a large one wherein this improvedvalve is intended to' be used,

so as a sewer conduit, and such-conduit is made" of an inexpensivemetal, like cast iron, and where rust roducing ingredients are presentin the uid flowing through the valve, then the ,casing of thisconstruction is also made of such inexpensive metal, as cast iron,

and the valve means proper is'then built up of a nonrustable metal, asbrass or a rustreslstmg steel, like nickel steel or chrome steel, and issecurely mounted in the casing,

so that the essential parts of the valve, that is the parts which arechiefly efiected by the wear and b the rust-producing ingredients.

in the flui will be constructed of a nonrustable material and willendure a very.

long time, while at the same time only a small part of the valve is ofexpensive material and the cost of the entire construction is thus keptat a minimum although all the long-enduring wearing qualities areincorporated in this form of valve.

In the present form of my invention these rust-resisting valve elementspreferably include a sleeve 12 of brass, or nonrustable steel, likenickel steel, or chrome steel; and

thissleeve is preferably forced into the intake end of the conduit, asby means of h v draulic pressure, thus being seated and he d therein'with a driving fit and being likewise adapted to be again dr1ve'n outtherefrom and replaced. The outer end of the sleeve is preferablythinned down to a substantially thin edge 13; while a valve seat j14 isprovided on the inner end of the sleeve, located beneath neck -9, and isformed globular or spherical on its seating? surface.

The valve element 15 is provided with a globular or spherical portion 16to fit snugly in the valve seat 14, and said element has an integral arm17 which is provided with a bearing sleeve 18" at its upper endextending up into neck 9. A pivot pin 19 extends through said sleeve andthrough ahole provided in the neck, for swinga ly mounting the valveelement, so that it will fit snugly in the seat 14, as shown in 'fulllines in Fig. 2,

whenever any backfiow closes it; and the arrow. Cups 20 are preferablythreaded or placed in each side of the neck, at each end of the pin, toenable removing the pin from either side of the casing, when it isdesired to remove the valve element. k

This construction provides a very eflicient valve and one that willendure for a long time, and at the same time provides a very economicalvalve.

I claim as my invention:

1. A back-water and check valve comprising a cast iron casing includinga main body portion having a tubular end part which has its interiorsurface smooth and straight from end to end of said part, a tubularbranch extending from said casing, a tubular sleeve of non-rustablemetal which has its exterior smooth and straight and which extends fromthe outer end of said part to project inwardly of said branch, beingheld with a driving fit tightly in said end part, to enable a tool toengage it through said branch to drive it out therefrom and to bereplaced therein without injury to the casing or the sleeve a valveelement having a smooth face to fit in saidvalve seat, an arm on saidvalve element pro vlded with pivot means on ltsend, and a plvot pinmounted insaid branch and extending through said pivot means to bereadily removable for removal of said valve elements;

2. A back-water and check valve compris ing a cast iron casing includinga main body portion having .a tubular end part which has its interiorsurface smooth and straight from end to end of said part, a tubularbranch ex tending from said casing, a tubular sleeve of non-rustablemetal which has its exterior smooth and straight and extends from theouter end of said part to project inwardly of said branch; being heldwith a driving fit tightly in said end part, for enabling a tool toengage it through said branch to drive it out therefrom and to bereplaced, therein without injuryto the casing or the sleeve, a

valve element having a ball-shaped portion with an entirely smooth faceto fit in said valve seat, an integral arm on said valve elementprovided with a sleeve on its outer end, a pivot pin extending throughsaid tubular branch and through said sleeve, and means in the branch, atthe two ends of the pin, to facilitate prompt'removal of the pin fromeither end thereof.

In testimony whereof I have signed my name to this specification.

' CECIL H. RYMAL.

